Project checked out with another CVS tool

It is possible to use a CVS project checked out using another
CVS tool into Eclipse. A common concern for those migrating to Eclipse is that
they already have their CVS project checked out on their local machine. You
don't have to check out the contents again to create a project in Eclipse.
When such a project is imported into Eclipse, the CVS plug-in may detect that
CVS folders exist and auto-share the project. However, there are some instance
were this does not occur and the project will need to be shared manually within
Eclipse in order to enable the CVS Team menu operations.

From the list of available repository providers, choose CVS and click
Next to go to the next page. (Note: If CVS is not present in
the list, it may be disabled. Clicking on the Show All Wizards
button should make it visible.)

The next page displays the sharing information stored in the CVS folder
of the project. Click Finish to share the project and enable
the CVS Team menu operations.